Boundary analysis technology of measuring gap between the different materials in closed body by ICT

Needding to define the integral area of the samples, when we measure the gap between the different materials in closed body by 9 MeV ICT. The quality of images declines in the image rebuildding affectted by many facts, especially representing image blur, distortion, yawp and so on. In the paper, we find integral area of the sample by dealing with images which are gained by industrial CT scan. In order to precisely measure the gap of the samples, we should find the integral area of the samples exactly. (authors)